Desiccating apparatus.



J. MEGREDY 8: D. M. A. G. HAWES.

DESIGGATING APPARATUS.

APPLICATION FILED JAN. 15, 1907.

Patented Mar. 16, 1909.

- UNITED sTATEs PATENT OFFICE.

JAMES MEOREDY AND DAVID MARC ANDREW GRAHAM HAWES, OF LONDON, ENGLAND.

DESIOGATING APPARATUS.

Specification of Letters Patent.

IPatented March 16, 1909.

Application filed January 15, 1907. Serial No. 352,475.

certain difliculties have been ex erienced in producing on a commercialsca e a uniformly satlsfactory product in a slmple, re-

liable, and efi'icient manner, and the object of this invention is toovercome these difficulties.

Figure 1 of the accom anying drawing represents diagrammatica y invertical secton and Fig. 2 1n planview our improved apparatus forcarrying out our present invention.

a is a cylindricalchamber or vessel, into the central and lower part ofwhich the liquid 7 to be treated is introduced under pressure by apipe 1) leading from the container n into a slpraylng or atomizingdevice 0 of any suitab e construction cold or heated air being alsointroduced by the ipe. d simultaneously with the liquid. e atomizedliquid ascends with force into the space in the central ,portion ofthecylindrical chamber a, .and ultimately falls outward toward the innersurface thereof, but is prevented from reachin such surface and settlingthereon by the ollowing means. In the up er part of the wall of thecylindrical cham er a is fitted a suitably shaped pipe 0 which alsointroduces heated air into. the chamber but in a tangential direction,so as to cause the said heated air to sweep around and around the innerwall of the vessel in a helical path, thereby covering the said wallwith a rapidly moving envelop or surface of heated air which finallyescapes from the vessel 0 by the annular gauze-covered opening 0 in thelower part thereof. As the atomized liquid falls outward, after havingbeen projected upward in the chamber, it is caught by this rapidlymoving envelop or surface of heated air, and instead of being depositedon the stationary wall of the chamber a, or falling directly to thebottom thereof, it is whirled around and around, and is thereby not onlyprevented from reaching the surface of the wall of the chamber andadhering thereto, but is also kept for a much longer period of time incontact the vortex of heated air as it gradually descends in a helicalpath towardthe bottom of the chamber.

Any suitable meansmay be provided for separating and collecting thepowder, and for allowing the spent air to escape. For example, the owdermay be deposited upon the surface 0 a cone-shaped p ate f at the bottomof the a paratus whenceit falls into any suitable co lecting vessel suchas g for example. v

Claim.

An apparatus for obtaining dry products from liquids and semi-1i uids,comprising a cylindrical chamber having gauze covered openingsconnecting its lower art with the atmosphere, 2. device for spraying theliquid upwardly into said chamber, a pipe entering said chambertangentially at the upper part thereof for delivering air thereto, andpowder collecting means in the lower part of the chamber. I

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

JAMES MECREDY. DAVID MARC ANDREW GRAHAM HAWES.

W1tnesses:

H. D. JAMEsoN, F. L. RANn.

